I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
pampero pamper pumper
pampero moper pumper pamper lumpier compeer limper jumpier jumper jimper camper gimpier humpier temper dumpier whimper damper champer semipro humper hamper campier simper romper hempier mumper compere lumper bumper bumpier ampere empery vamper vampier tempera tamper wimpier dumper chomper